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sparc: remove the mapping_error dma_map_ops method

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Sparc already returns (~(dma_addr_t)0x0) on mapping failures, so we can
switch over to returning DMA_MAPPING_ERROR and let the core dma-mapping
code handle the rest.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2018-11-21 18:59:05 +01:00
parent 44899aa31f
commit 06301c5e0a
3 changed files with 7 additions and 21 deletions
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12
arch/sparc/kernel/iommu.c
View File

@ -315,7 +315,7 @@ bad:
bad_no_ctx:
if (printk_ratelimit())
WARN_ON(1);
return SPARC_MAPPING_ERROR;
return DMA_MAPPING_ERROR;
}
static void strbuf_flush(struct strbuf *strbuf, struct iommu *iommu,
@ -548,7 +548,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
if (outcount < incount) {
outs = sg_next(outs);
outs->dma_address = SPARC_MAPPING_ERROR;
outs->dma_address = DMA_MAPPING_ERROR;
outs->dma_length = 0;
}
@ -574,7 +574,7 @@ iommu_map_failed:
iommu_tbl_range_free(&iommu->tbl, vaddr, npages,
IOMMU_ERROR_CODE);
s->dma_address = SPARC_MAPPING_ERROR;
s->dma_address = DMA_MAPPING_ERROR;
s->dma_length = 0;
}
if (s == outs)
@ -742,11 +742,6 @@ static void dma_4u_sync_sg_for_cpu(struct device *dev,
spin_unlock_irqrestore(&iommu->lock, flags);
}
static int dma_4u_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return dma_addr == SPARC_MAPPING_ERROR;
}
static int dma_4u_supported(struct device *dev, u64 device_mask)
{
struct iommu *iommu = dev->archdata.iommu;
@ -772,7 +767,6 @@ static const struct dma_map_ops sun4u_dma_ops = {
.sync_single_for_cpu = dma_4u_sync_single_for_cpu,
.sync_sg_for_cpu = dma_4u_sync_sg_for_cpu,
.dma_supported = dma_4u_supported,
.mapping_error = dma_4u_mapping_error,
};
const struct dma_map_ops *dma_ops = &sun4u_dma_ops;

2
arch/sparc/kernel/iommu_common.h
View File

@ -48,6 +48,4 @@ static inline int is_span_boundary(unsigned long entry,
return iommu_is_span_boundary(entry, nr, shift, boundary_size);
}
#define SPARC_MAPPING_ERROR (~(dma_addr_t)0x0)
#endif /* _IOMMU_COMMON_H */

14
arch/sparc/kernel/pci_sun4v.c
View File

@ -414,12 +414,12 @@ static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page,
bad:
if (printk_ratelimit())
WARN_ON(1);
return SPARC_MAPPING_ERROR;
return DMA_MAPPING_ERROR;
iommu_map_fail:
local_irq_restore(flags);
iommu_tbl_range_free(tbl, bus_addr, npages, IOMMU_ERROR_CODE);
return SPARC_MAPPING_ERROR;
return DMA_MAPPING_ERROR;
}
static void dma_4v_unmap_page(struct device *dev, dma_addr_t bus_addr,
@ -592,7 +592,7 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
if (outcount < incount) {
outs = sg_next(outs);
outs->dma_address = SPARC_MAPPING_ERROR;
outs->dma_address = DMA_MAPPING_ERROR;
outs->dma_length = 0;
}
@ -609,7 +609,7 @@ iommu_map_failed:
iommu_tbl_range_free(tbl, vaddr, npages,
IOMMU_ERROR_CODE);
/* XXX demap? XXX */
s->dma_address = SPARC_MAPPING_ERROR;
s->dma_address = DMA_MAPPING_ERROR;
s->dma_length = 0;
}
if (s == outs)
@ -688,11 +688,6 @@ static int dma_4v_supported(struct device *dev, u64 device_mask)
return pci64_dma_supported(to_pci_dev(dev), device_mask);
}
static int dma_4v_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return dma_addr == SPARC_MAPPING_ERROR;
}
static const struct dma_map_ops sun4v_dma_ops = {
.alloc = dma_4v_alloc_coherent,
.free = dma_4v_free_coherent,
@ -701,7 +696,6 @@ static const struct dma_map_ops sun4v_dma_ops = {
.map_sg = dma_4v_map_sg,
.unmap_sg = dma_4v_unmap_sg,
.dma_supported = dma_4v_supported,
.mapping_error = dma_4v_mapping_error,
};
static void pci_sun4v_scan_bus(struct pci_pbm_info *pbm, struct device *parent)